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Table 2 Reporting quality of key methodological items (n = 246)

From: Quality of randomized controlled trials reporting in the treatment of melasma conducted in China

Item

Criteria

Description

Number of positive trials

%

Cohen’sкcoefficient

95% CI

8

Randomization

Description of the method used to generate the random sequence

41

17

0.85

0.76 to 0.95

9 and 10

Allocation concealment and implementation

Description of the method used to implement the random allocation sequence assuring the concealment until interventions are assigned

1

0

0.75

0.65 to 0.88

11

Blinding

Whether or not participants, those administering the interventions, or those assessing the outcomes were blinded to group assignment

6

2

0.78

0.72 to 0.87

15

Baseline data

An outline of baseline demographic and clinical characteristics of each group

147

60

0.82

0.78 to 0.90

16

Intent-to-treat analysis

Number of participants in each group included in each analysis and whether it was done by ‘intention-to-treat’

5

2

0.86

0.78 to 0.98